ARKANSAS FLORA: ADDITIONS, REINSTATEMENTS, EXCLUSIONS, AND RE-EXCLUSIONS

摘要

Nine species are repotted as new to the flora oí Arkansas: Agalinis nuttallii Shinners (Scrophulariaceae), Azolla caroliniana Willd (Azollaceae), Crataegus thermopegaea Palmer (Ro-saceae), Cyrtomium falcatum (L.f) K. Presl (Dryopteridaceae), Nerium o leander L (Apocynaceae), Polygala alba Nutt (Polygalaceae), Púnicagranatum L. (Punicaceae), Ridnus communis L (Euphor-biaceae), and Schinus terebinthifolius Raddi (Anacardiaceae) They are a mixture of extinct, overlooked, or urban exotic-escaped species , some of which are of special concern as they pose new problems for urban poison control workers Literature and herbarium work uncovered that 12 Arkansas species previously excluded actually have known and valid vouchers, and they are re-instated: Acaci afarnesiana (L ) Willd (Mimosaceae), Arabisglabra (L.) Bernh (Brassicaceae), Canavalia ensiformis(L. ) DC (Fabaceae), CladiumjamaicenseCiantz(Cyperaceae), Eragrostistrichodes (Nutt) Wood (Poaceae), Halesía díptera Ellis (Styracaceae), Lygodesmia júnce a (Pursh) D Don (Asteraceae), Prosopis glandulosa lorr var glandulosa (Mimosaceae), Rhynchospora colórala (L ) Pfeiffei (Cyperaceae), Rosa canina L. (Rosaceae), Sagina procumbens L. (Caryophyllaceae), and Trifolium stoloniferum Muhl (Fabaceae) Another 1 3 species previously excluded and/or re-excluded from Arkansas were recently and erroneously re-instated, requiring re-exclusion Another 76 species are here excluded, being reported erroneously as being from Arkansas, based either on literature reports t hat lack supporting voucher specimens or on a variety of clerical errors. These 21 additions and 89 subtractions to the Arkansas flora point to problems in achieving a uniform basis of deciding which plants to include in a f lor a and what constitutes su fficient documentation for known and valid vouchers.